Multiple-effect evaporating apparatus



Sept 8, 1925. 1,552,534

P. A. BANCEL MULTIPLE EFFECT EVAPORATING APPARATUS Filed June 8 19-33INVENTOR Pau-ZA. B-ancel W i Y Patented Sept. 8, 1925.

UNITED STATES PAUL A. RANGE, OF N UTLEY, NEW JERSEY, ASSIGNO'R TOINGERSOLL-RAND COM- 1,552,534 PATENT OFFICE.

PANY, OF JERSEY CITY, NEW JERSEY, -A CORPORATION OF NEW JERSEY.

MULTIPLE-EFFECT nvaroaa'rmo arrana'rus.

Application 111611 June 8, 1923. Serial No. 644,130.

To'all whom it may concern: 0

Be it known that 1, PAUL A. BANeEL, a citizen of the United States, aresident of Nutley, county of Essex, and State of New Jersey, haveinvented a certain Multi le-Effeet Evaporating Apparatus, of which thefollowing is a specification, accompanied by drawings: ,7 4

This invention relates to evaporating apparatus, but more particularlyto multiple efi'ectapparatus, suitable for use in the sugar industry inevaporating sugar syrup, but also applicable to the evaporation of otherliquids as desired.

The object of the invention is to enable multiple efieet evaporatingapparatus to be more economically used with a main condenser andintercooler or intercondenser, and with an evacuator connected to theintercooler, capable of producing a vacuum appreciably higher than thesteam pressure in the last or final efleet of the series, in order tocause flow of air and non-condensable gases or vapors from the saidfinal efi'ect to the intercooler.

By venting the steam box of the last or final efieet of the evaporatingapparatus to the intercooler, instead of to the main condenser, theprimary steam jets and the main condenser itself are relieved of thisair and vapor leakage, so that a smaller vacuum pumpmay be used forevacuation.

The invention is shown in one of its preferred forms in the accompanyingdraw ings, in which' Figure 1 is a diagrammatic side elevation ofmultiple eifeet evaporatingapparatus embodying the invention, and

Figure 2 is an enlarged detail vertical sectional view taken through theintercooler.

Referring to the drawings, a plurality of steam heated evaporators A areconnected in series with each other, by connecting the steam and vaporoutlet pipe B of each evaporator or efiect to the steam inlet C of thesteam box G of the next adjacent evaporator or effect. Steam for heatingpurposes is supplied at the steam inlet D of the first steam box G, fromany suitable source, (not shown), and a main condenser, in this instancea barometric condenser E is connected to the outlet pipe F from theevaporating chamber of the last effect. The evaporators A may be of anysuitable or standard construction in which the evaporating chamber maybe divided by the heating chamber into the usual upper and lower liquidcontaining chambers connected by circulating tubes which pass throughthe heating chamber but this internal well known construction is notshown for the sake of simplicity. The syrup is heated in the lowerliquid-containing compartments or chambers, and the sugar is withdrawnfrom these chambers at the bottom outlets H. The main discharge outletsfrom the steam boxes G may be connected in any suitable or usual manner(not. v shown) to evacuating apparatus.

The barometric condenser E may be of standard construction; Anintercooler J which may be like that, disclosed in my Patent'No.1,526,040, February 10,1925, for steam jet condenser pump, is connectedto themain condenser by the pipe K and primary aug'menter jets Lsupplied with steamfrom the supply pipeO, compress air and gases fromthe main condenser and discharge into the intercooler at low vacuum. Theintercooler is supplied with water by the pipe P connected to the watersupplyand rimary steam ets L of this air leakage.

In t e present instance, the vents W are.

located at the lower portions of the evaporators A, in the steam beltsor boxes G forming the heating chambers or compartments, and the pipes Xfrom each auxiliary vent are conveniently connected to the common ventpipe Y which is' connected to the intercooler at ,Z. Air andnon-condensable ases and vapors from the steam boxes or lts pass oil?through the auxiliary vent pipes X and Y to the'intereooler J. Theevacuating apparatus comprising the primary jets L and the secondaryjets R and vacuum pump S should be capable of producing avacuum'appreciably higher than the vacuum in the last or finalevaporator or efi'ect A nearest to the main condenser E in the series,

in order to cause flow of the air and noncondensable gases or vaporsfrom the steam box of the said last effect to the intercooler.

' evaporators connected in series and having steam boxes, in combinationwith a maincondenser connected next in series with the evaporatingchamber of the finalevaporator or effect, an intercooler connected next'in series to the main condenser and means for venting non-condensableases from the steam box of the said last e ect directly into the saidintercooler, thereby causing a flow of air and non-condensable gases orva ors from the steam box of the said last e ect into the intercooler,and an evacuator connected to the intercooler.

2. Multiple effect eva rating apparatus, comprising a plurality ofgteamheated evaporators connected in series and having steam boxes, incombination" with a main condenser for said apparatus connected next inseries-with the evaporating chamber of the final evaporator or efiectand having an intercooler connected next in series thereto and anevacuator connected next in series after the intercooler capable ofproducing a vacuum appreciably higher than the steam pressure in thefinal efi'ect of the series, and means for venting non-condensable gasesfrom the steam box of the said last effect directly into theintercooler, thereby causing 'a flow of air and non-condensable gases orvapors from the steam box of the said last efi'ect into the intercooler.

3. -Multiple efiect evaporating apparatuscomprising a plurality of steamheated evaporators connected in series and having steam boxes, incombination'with a main condenser for said apparatus connected next 1nseries with the evaporating chamber of the final evaporator or effectand having. an intercooler connected next in series thereto and anevacuator connected next in series after the intercooler capable ofproducing a vacuum appreciably higher than the steam pressure in thefinal efi'ect of the series, and a pipe for venting non-condensablegases connecting the steam box of the saidlast effect directly with theintercooler, thereby causing the How of air and non-condensable gases orvapors'fromthe steam box of the said last effect into the intercooler.

4.,Multiple effect evaporating apparatus, comprising a plurality ofsteam heated 'evaporators connected in series and having steam boxes, 1ncombination wlth a maln condenser for said apparatus connected next .inseries with the evaporating chamber of the final evaporator or effectand having an intercooler connected next in series thereto and anevacuator connected next in series after the intercooler capable ofproducing a vacuum appreciabl higher than the steam pressurein thefinale-fleet of the series, vent pipes for venting non-condensable.gases fromlthe steam boxes of the efl'ects connected to a common ventpipe, and means connecting the saidcommon vent pipe directly to the saidintercooler.

In testimony whereof I have signed this specification.

PAUL A. BANCEL.

